Suitable for manual start of fire extinguishing systems. It works in the alarm loop of the S2000-4, Signal-20P, S2000-ASPT, Signal-10, Signal-20M or similar control and monitoring devices, providing the loop voltage up to 30 V and limiting the current
in the loop at the level not exceeding 25 mA. Functions: monitoring the state of the key; transmission of notices to the receiving and control unit (device); indication of operating modes (key status) on the built-in light indicator.
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